Improvement in apparatus foe tapering measures



A. HATCH Measuring Tapers.

Patented Feb. 19.1867.

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IMPROVEMENT IN APPARATUS FOR TAPERING MEASURES.

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TO ALL WHOM IT'MAY CONCERN:

'Beit known that I, ANSON HATCH, of the city and county of New Haven, in the State of Connecticut, hate invented a new and useful improvement in Apparatus for Measuring or Determining the Rate or Degree oi" the Taper on any solid whose sides are right lines; and I do hereby declare that the following is a full, clear, anrl,exaet description of the construction, character, and operation of the same, reference being had to the accompanying drawings, which make part of this specification, in which-- I Figure 1 is a perspective view of the machine or apparatus, showing the index-wheel, screw, graduated plate, bars, jaws, 55c. v

Figure 2 is a section of the same, cut vertically through the centre of the index-wheel and screw, and across the bars or arms, kc. I I

My improvement consists in attaching two bars or arms at one end of each by a proper joint-pin or screw, on which joint-pin one of the arms vibrates or swings, so that the two arms may he brought together perfectly parallel with each other or they may, by the use of an index-wheel and a screw, be separatcd at the front or detachecl ends, so that the two arms will form the two equal sides of an isosceles triangle, while the base or unequal side may be set or adjusted to any desired extent by turning the index-wheel and screw; and in attaching to these arms, by suitable dove-tail slides, two jaws similar to the jaws of-a rise, with their faces parallel to each other, or inclined in the same manner and in the same degree as the arms are at all times, although they may be much further apart, so that a tapering piece may bemeasured so as to determine the number of one-thousandth partsol an inch it tapers in one inch in length without reference to its diameter or length. I make the frame of the machine or apparatus of cast iron or any other suitable material, substantially of the form indicated at A A A, fig. 1, or in any other convenient form. I make the stationary arm substantially as indicated at B B and C, fig. 1, arid in section at C O, fig. 2, and secure it to the frame A by means of screws or otherwise, so as to hold all of the work firm and steady. On the broad part'of this stationary arm, as near B, I attach or cast a dove-tail piece like that indicated at a, fig. 1, on to which I slip the piece'D, which has in its under side a dove-tail space like that shown at I, fig. 1, on which slide or piece D I fitor cast the stationary jaw,

as E, and I'securc this piece I) on the dovetail by means of binding screws, as c c c. In front of the piece I), I

lit a graduated scal c, as F, fig. 1, graduated to correspond with the threads of the screw G, figs 1 and 2, so that by counting the lines I can at once determine how many timesthc index-wheel H hasbeen turned, which will determine the degree of inclination of the two arms, and consequently of the two jaws. In the front end of this stationary arm I fit a block, cltl, which works in the and C C with a round tenon, as c c, which I secure in its place hy a screw, g, in such a manner that it will turnfreely to preserve its'parallolism with the other block, lz it, whatever may be the'inclination of the two arms; and througlnthe centre of this block 12 (Z I make a hole in which the shaft of the graduated screw g works, all as represented in fig. 2, and indicated ill fig. 1. I make the movable arm J J and K of the same shape asthc stationary one B B and C, but reversed, and I secure it to the framc'and stationary arm by a propcr joint, as shown at N, fig. 1; and I fit the piece L,-jaw M, with the dovc-tail (land I, and secure it with binding screws I ll precisely as dcscrihedabove for the stationary arm;

and I attach to this pmrahlc arm a metallic pointer, as m, .to indicate on thegraduated scale F the number of turns of the screw G, or index whccl H; and I make each of these arms ten inches in lcngtlnas a convenience for computation, &c. And in the front end of the movable arm J J andK, I fit block, it it, with a round tenon,-

n n, secured by a-scrcw, 11, all as represented in fig; 2, and indicated in fig. 1,'and operated in the same manner as those described in connection with the stationary arnn And through the block 72 IL I drill and tap a holefor the graduated screw G, as shown in section at r, fig. and indicated in fig. l. I make all the parts heretofore described of cast iron or any other suitahlcmaterial, except the screws, which should be made of steel. I make the graduated screw G of cast steel or any other suitablematerial, oftwenty threads to the in'ch, when the index-wheel has fifty notches or spaces, or with ten"threads to thc'iuch when the index-wheel has one hundred notches or spaces; so that by revolving the wheel, one-notchwill set the arms and jaws inclined to the degree of one-thousandth part of an inch in the length-of one inch. On this screw G,'I turn or leave a collar, as shown ate, figs. 1 and 1; and I turn the shank or shaft-hack of collar down to a convenient size to work inthe hole through the block (1 d, as shown at j, and I make it long enough to extend through the index-wheel H and its collar t t, all as shown in section in fig. 2, and indicate'dat t, fig. 1. I make the index-wheel H, figs. 1 and 2,

with fifty notches or spaces when use a screw with twenty threads to the'inch, or with one hundred notches when I use a screw of ten threads to the inch, as stated above; and I secure this index-wheel in any suitable manner to a collar like t, figs. 1 and 2, which, when properly adjusted, I secure by a binding screw, as .21), figs. 1 and 2, or by any other convenient means,.so that the shoulder of the collar t will run against the block (2 d, as shown in fig. 2, so as not to allow of any end chase to the screw G to afieet the graduation of the inclination of the arms. I make a suitable index or point to enter the notches or spaces in the index-wheel, and fit it to a suitable slide to allow' a reciprocating motion, as shown at 2'1, fig. 1. Having made and arranged the several parts as before described and represented in fig. 1, by revolving the index-wheel II, I bring the two arms to the inclination to cause the faces of the two jaws E and M to exactly fit the taper of the article which I am measuring, having moved the jaw M in or out, to suit the diameter of the article. I then read on the graduated scale F the number of full turns of the index-wheel, and the balance or number of notches on the index-wheel, and divide the amount by ten, (that being the length of the arms,) which will give the taper in the thousandths of an inch to one inch in length. I may also fit this index-wheel, screw, &c., on the piece D, fig. 1, and have the adjusting or graduating screw G pass through thejaw E, and work in a female thread in the jaw M, so that when the arms, and consequently the jaws, are parallel, I may by the use of the index-wheel, &c., measure the diameter or side of any piece whose sides are parallel with equal certainty to the one-thousandth part of an inch. But the apparatus could not'be fitted to measure tapers and prisms at the same time, as one would interfere withthe other, and that for measuring parallels must be removed when the other is used.

What I claim as my invention, and desire to secure by Letters Patent, is I g Y 1. The combination of the-two arms and jaws with the index-wheel and screw, when they are constructed, arranged, and fitted for measuring tapers, substantially as herein described.

' 2. I claim the combination of the two jaws with the index-wheel and screw, when they are constructed, arranged, and fitted for measuring the diameters or sides of prisms, or articles whose opposite sides are parallel, substantially as herein described and set forth.

ANSON HATCH.

Witnesses:

N. O. HUBBELL, R. FITZGERALD. 

